class Person:
    name = 'test01'


p1 = Person()
print(Person.name)
print(p1.name)

p2 = Person()
print(Person.name)
print(p2.name)
p2.name = 'zhangsan'
print(Person.name)
print(p2.name)

p1.age = 20
print(Person.age)
print(p1.age)
